Guffey, M. E., & Loewy, D. (2010). Essentials of business communication (8th ed.). South-Western/Cengage Learning.
Citação norma ChicagoGuffey, Mary Ellen, and Dana Loewy. Essentials of Business Communication. 8th ed. Mason, Ohio: South-Western/Cengage Learning, 2010.
Citação norma MLAGuffey, Mary Ellen, and Dana Loewy. Essentials of Business Communication. 8th ed. South-Western/Cengage Learning, 2010.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.